title: Phase-controlled switching by interference between incoherent fields in a double-Λ system.
abstract: We showed experimentally interference could be occurred between incoherent lights in a double-Λ lambda transition implemented with rubidium atomic vapor. Switching of probe transmission was controlled by the phases of two` independent probe lasers with low light intensity. More than 70% of the probe transmission could be switched by ultra-weak incoherent field. We suggested optically cryptic information could be delivered by the phase-controlled switching with incoherent fields in a double-Λ system.
authors.affiliation: Quantum optics Laboratory, Advanced Photonics Research Institute, GIST, Gwangju 500-712, South Korea. hunskang@gist.ac.kr
authors.forename: Hoonsoo
authors.initials: H
authors.lastname: Kang
authors.forename: Bongjune
authors.initials: B
authors.lastname: Kim
authors.forename: Young Ho
authors.initials: YH
authors.lastname: Park
authors.forename: Cha-Hwan
authors.initials: CH
authors.lastname: Oh
authors.forename: In Won
authors.initials: IW
authors.lastname: Lee
mesh_terms: D007368:Interferometry / Q000379:methods*; D008027:Light; D012031:Refractometry / Q000379:methods*; D012413:Rubidium / Q000737:chemistry*; D012542:Scattering, Radiation; D012815:Signal Processing, Computer-Assisted
chemical_list: D012413:Rubidium